CBSE Board Practice

CBSE Grade VII - Exponents and Powers
Question 1
1.
    • The value of
    •    
      3
      (
      -5

      3
      )
           
    • ÷
    •    
      2
      (
      3

      2
      )
           
  •    
    2
    (
    -500

    243
    )
         
  • (
    -166

    81
    )
  • (
    -500

    243
    )
  • (
    -500

    241
    )
  • (
    -502

    243
    )
Question 2
2.
    • Write the given number in usual form
    • -5.396117
      10 -2
       
  • -0.0005396117
  • -0.5396117
  • -0.005396117
  • -0.05396117
  • -5.396117
Question 3
3.
    • The value of
    • 5 2
       
    • (-3) 2
       
  • 223
  • 225
  • 228
  • 224
  • 225 2
     
Question 4
4.
    • Simplify the expression
    • 2 2
       
    • 2 2
       
    • 5 2
       
  • 20
  • 23 2
     
  • 20 2
     
  • 20 3
     
  • 18 2
     
Question 5
5.
    • (
      c
      5
       
      )
      (
      d
      +
      4
      )
    • =
  • c
    (
    5
    d
    20
    )
  • c
    (
    d
    +
    14
    )
  • c
    (
    d
    +
    25
    )
  • c
    (
    5
    d
    +
    9
    )
  • c
    (
    5
    d
    +
    20
    )
Question 6
6.
    • Simplify the expression
    • (-8) 2
       
    • (-8) 7
       
  • (-8) 10
     
  • (-8) 8
     
  • (-8) 9
     
  • (-10) 9
     
  • (-6) 9
     
Question 7
7.
Which of the following statements are true?
a)
    • (
      x
      m
      )
      n
    •  
    • =
    •  
    • (
      x
      n
      )
      m
b)
    • a
      m
      .
      a
      n
    •  
    • =
    •  
    • a
      m
      n
c)
    • (
      x
      m
      )
      n
    •  
    • =
    •  
    • x
      (
      m
      +
      n
      )
d)
    • a
      0
    •  
    • =
    •  
    • 1
    •  
    • (
    • a
    • 0)
e)
    • x
      m

      x
      n
    •  
    • =
    •  
    • x
      m

      n
f)
    • a
      .
      x
      m
    •  
    • =
    •  
    • a
      m
      .
      x
      m
  • {b,d,a}
  • {e,f,a}
  • {c,d}
  • {b,a}
  • {a,d}
Question 8
8.
    • The
    • power
    • in the term
    • 3 2
       
    • is
  • -3
  • 3
  • -2
  • 0
  • 2
Question 9
9.
    • Write the given number in usual form
    • 4.452166
      10 -5
       
  • 0.004452166
  • 0.0000004452166
  • 0.000004452166
  • 0.00004452166
  • 0.0004452166
Question 10
10.
    • f
      f
      f
      f
      g
      g
      g
      g
      h
      h
    • =
  • 3
    f
    4
    g
    4
    h
    2
  • f
    5
    g
    4
    h
    2
  • f
    4
    g
    4
    h
    2
  • f
    3
    g
    4
    h
    2
  • f
    4
    g
    4
    h
    2